High severity7.5NVD Advisory· Published Oct 29, 2019· Updated Jun 17, 2026
CVE-2019-3979
CVE-2019-3979
Description
RouterOS versions 6.45.6 Stable, 6.44.5 Long-term, and below are vulnerable to a DNS unrelated data attack. The router adds all A records to its DNS cache even when the records are unrelated to the domain that was queried. Therefore, a remote attacker controlled DNS server can poison the router's DNS cache via malicious responses with additional and untrue records.
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Affected products
2- MikroTik/RouterOSdescription
Patches
Vulnerability mechanics
References
1- www.tenable.com/security/research/tra-2019-46nvdThird Party Advisory
News mentions
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